/******************************************************************************* | |
Copyright (c) 2006-2015 Cadence Design Systems Inc. | |
Permission is hereby granted, free of charge, to any person obtaining | |
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"Software"), to deal in the Software without restriction, including | |
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The above copyright notice and this permission notice shall be included | |
in all copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE | |
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******************************************************************************/ | |
/****************************************************************************** | |
Xtensa-specific interrupt and exception functions for RTOS ports. | |
Also see xtensa_intr_asm.S. | |
******************************************************************************/ | |
#include <stdlib.h> | |
#include <xtensa/config/core.h> | |
#include "freertos/FreeRTOS.h" | |
#include "freertos/xtensa_api.h" | |
#include "freertos/portable.h" | |
#include "rom/ets_sys.h" | |
#if XCHAL_HAVE_EXCEPTIONS | |
/* Handler table is in xtensa_intr_asm.S */ | |
extern xt_exc_handler _xt_exception_table[XCHAL_EXCCAUSE_NUM*portNUM_PROCESSORS]; | |
/* | |
Default handler for unhandled exceptions. | |
CHANGED: We do this in panic.c now | |
*/ | |
//void xt_unhandled_exception(XtExcFrame *frame) | |
//{ | |
//exit(-1); | |
//} | |
extern void xt_unhandled_exception(XtExcFrame *frame); | |
/* | |
This function registers a handler for the specified exception. | |
The function returns the address of the previous handler. | |
On error, it returns 0. | |
*/ | |
xt_exc_handler xt_set_exception_handler(int n, xt_exc_handler f) | |
{ | |
xt_exc_handler old; | |
if( n < 0 || n >= XCHAL_EXCCAUSE_NUM ) | |
return 0; /* invalid exception number */ | |
/* Convert exception number to _xt_exception_table name */ | |
n = n * portNUM_PROCESSORS + xPortGetCoreID(); | |
old = _xt_exception_table[n]; | |
if (f) { | |
_xt_exception_table[n] = f; | |
} | |
else { | |
_xt_exception_table[n] = &xt_unhandled_exception; | |
} | |
return ((old == &xt_unhandled_exception) ? 0 : old); | |
} | |
#endif | |
#if XCHAL_HAVE_INTERRUPTS | |
/* Handler table is in xtensa_intr_asm.S */ | |
typedef struct xt_handler_table_entry { | |
void * handler; | |
void * arg; | |
} xt_handler_table_entry; | |
extern xt_handler_table_entry _xt_interrupt_table[XCHAL_NUM_INTERRUPTS*portNUM_PROCESSORS]; | |
/* | |
Default handler for unhandled interrupts. | |
*/ | |
void xt_unhandled_interrupt(void * arg) | |
{ | |
ets_printf("Unhandled interrupt %d on cpu %d!\n", (int)arg, xPortGetCoreID()); | |
} | |
/* | |
This function registers a handler for the specified interrupt. The "arg" | |
parameter specifies the argument to be passed to the handler when it is | |
invoked. The function returns the address of the previous handler. | |
On error, it returns 0. | |
*/ | |
xt_handler xt_set_interrupt_handler(int n, xt_handler f, void * arg) | |
{ | |
xt_handler_table_entry * entry; | |
xt_handler old; | |
if( n < 0 || n >= XCHAL_NUM_INTERRUPTS ) | |
return 0; /* invalid interrupt number */ | |
if( Xthal_intlevel[n] > XCHAL_EXCM_LEVEL ) | |
return 0; /* priority level too high to safely handle in C */ | |
/* Convert exception number to _xt_exception_table name */ | |
n = n * portNUM_PROCESSORS + xPortGetCoreID(); | |
entry = _xt_interrupt_table + n; | |
old = entry->handler; | |
if (f) { | |
entry->handler = f; | |
entry->arg = arg; | |
} | |
else { | |
entry->handler = &xt_unhandled_interrupt; | |
entry->arg = (void*)n; | |
} | |
return ((old == &xt_unhandled_interrupt) ? 0 : old); | |
} | |
#if CONFIG_SYSVIEW_ENABLE | |
void * xt_get_interrupt_handler_arg(int n) | |
{ | |
xt_handler_table_entry * entry; | |
if( n < 0 || n >= XCHAL_NUM_INTERRUPTS ) | |
return 0; /* invalid interrupt number */ | |
/* Convert exception number to _xt_exception_table name */ | |
n = n * portNUM_PROCESSORS + xPortGetCoreID(); | |
entry = _xt_interrupt_table + n; | |
return entry->arg; | |
} | |
#endif | |
#endif /* XCHAL_HAVE_INTERRUPTS */ | |